Superconductivity

Superconductivity has unlocked a number of technological advances as well as new areas of study. If you are not sure that you understand superconductivity and what it is, or would just like an alternative approach to explaining it, then watch the Superconductivity Dance Flash Mob - 4:38 minutes.

There are many video clips available about superconducting magnets being used to create magnetic levitation trains. One in Japan has recently broken the world speed record for trains at 603km/hr.
Two of my favourites are from the Royal Institution - 7:29 minutes and from IFW Dresden - 4:33 minutes.